The evolution of the traplining pollinator role in hummingbirds: specialization is not an evolutionary dead end.
The evolution of the traplining pollinator role in hummingbirds: specialization is not an evolutionary dead end.
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DOI：
10.1098/rspb.2021.2484
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发表时间：
2022-01-26
期刊：
影响因子：
--
通讯作者：
Thomas GH
中科院分区：
文献类型：
--
作者：
Rombaut LMK;Capp EJR;Hughes EC;Varley ZK;Beckerman AP;Cooper N;Thomas GH
捕虫者是沿着迂回的觅食路线访问广泛散布的花朵的传粉者。蜂鸟诱捕的进化被认为是通过长喙与广泛分布的植物物种的长管花的相互共同进化而实现形态特化的。专业化，如诱捕蜂鸟所展示的专业化，通常被视为不可逆转和进化的死胡同。我们在宏观进化框架中测试了这些预测。具体而言，我们评估了喙形态和觅食之间的关系，并测试了过渡到诱捕是否是不可逆转的，并导致较低的多样化率预测的假设，专业化是一个进化的死胡同。我们发现，已经有多个独立的过渡到诱捕整个蜂鸟发育，但逆转已经罕见或不完整的。多个独立的捕猎者谱系在形态上已经变得特化，趋同地进化出相对于它们身体大小的相对较大的喙。然而，诱捕并不是进化的死胡同，因为诱捕者继续以与非诱捕者相当的速度产生新的诱捕物种。
Trapliners are pollinators that visit widely dispersed flowers along circuitous foraging routes. The evolution of traplining in hummingbirds is thought to entail morphological specialization through the reciprocal coevolution of longer bills with the long-tubed flowers of widely dispersed plant species. Specialization, such as that exhibited by traplining hummingbirds, is often viewed as both irreversible and an evolutionary dead end. We tested these predictions in a macroevolutionary framework. Specifically, we assessed the relationship between beak morphology and foraging and tested whether transitions to traplining are irreversible and lead to lower rates of diversification as predicted by the hypothesis that specialization is an evolutionary dead end. We find that there have been multiple independent transitions to traplining across the hummingbird phylogeny, but reversals have been rare or incomplete at best. Multiple independent lineages of trapliners have become morphologically specialized, convergently evolving relatively large bills for their body size. Traplining is not an evolutionary dead end however, since trapliners continue to give rise to new traplining species at a rate comparable to non-trapliners.
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影响因子：
2.1
作者：
Day, E. H.;Hua, X.;Bromham, L.
通讯作者：
Bromham, L.
影响因子：
2.1
作者：
Cotton, PA
通讯作者：
Cotton, PA
影响因子：
2.8
作者：
BROWN, JH;BOWERS, MA
通讯作者：
BOWERS, MA
影响因子：
64.8
作者：
Cooney CR;Bright JA;Capp EJR;Chira AM;Hughes EC;Moody CJA;Nouri LO;Varley ZK;Thomas GH
通讯作者：
Thomas GH
影响因子：
6.5
作者：
Caetano, D. S.;Harmon, L. J.
通讯作者：
Harmon, L. J.